Creating better health care, education and housing for everyone is a simple idea, but ____ which is hard to put into practice.
_________ the exercises, we went on to learn the new words in the next unit.
—________ You look very depressed. —I failed the driving test again.
What depressed her was that although she kept waving her hand, nobody seemed _______ her new watch.
______ which school was suitable for their son, the parents visited lots of different primary schools in the city.
It is best to eat three meals a day; otherwise, it is possible____ your health will suffer later in life.